20170658429 has 4 divisors (see below), whose sum is σ = 20184170076. Its totient is φ = 20157146784.

The previous prime is 20170658411. The next prime is 20170658441. The reversal of 20170658429 is 92485607102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19153176025 + 1017482404 = 138395^2 + 31898^2 .

It is a cyclic number.

It is not a de Polignac number, because 20170658429 - 2²⁰ = 20169609853 is a prime.

It is a super-2 number, since 2×20170658429² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20170658429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20170658929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6753584 + ... + 6756569.

It is an arithmetic number, because the mean of its divisors is an integer number (5046042519).

Almost surely, 2^20170658429 is an apocalyptic number.

It is an amenable number.

20170658429 is a deficient number, since it is larger than the sum of its proper divisors (13511647).

20170658429 is a wasteful number, since it uses less digits than its factorization.

20170658429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13511646.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 20170658429 in words is "twenty billion, one hundred seventy million, six hundred fifty-eight thousand, four hundred twenty-nine".